The Japanese AI-readiness data layer.

REST API over our corpus of crawled Japanese domains — llms.txt adoption, schema coverage, page-level signals, and AI-search readiness scores. Built for AI agents, SEO tools, and research teams who need structured data on how the Japanese web is preparing for ChatGPT, Gemini, and Perplexity.

…Domains crawled

…Pages indexed

…Embeddings

…Last fetch

Quickstart

Every endpoint is a stable JSON REST contract. No SDKs needed.

curl https://api.seoai.space/v1/health

curl -H "Authorization: Bearer $SEOAI_API_KEY" \
     https://api.seoai.space/v1/domain/example.jp

Authentication

Every authed endpoint requires a Bearer token in the Authorization header (or ?api_key= for browser demos). Each call is logged with status code and latency for transparent billing and abuse detection.

Authorization: Bearer sk_seoai_XXXXXXXXXXXXXXXXXXXXXXXXXXXX

Get a key by emailing sales@seoai.space with your use case. Keys are issued per organization with a monthly call quota matching your tier.

Endpoints

GET/v1/healthpublic

Liveness check. Returns {"ok": true} when the API and corpus DB are reachable.

GET/v1/statspublic

Aggregate corpus stats — domain/page/embedding counts and freshness. Useful for status pages and the live counter on this page.

GET/v1/domain/<domain>api key

Full corpus profile for one domain — Tranco rank, country, last crawl, page count, signal aggregates (has_meta_desc, has_h1, JS-rendered ratio), and a sample of recent pages.

GET/v1/industry/<slug>/domainsapi key

Paginated list of domains tagged with an industry slug. Schema is stable today; full industry tagging lands in v1.1.

POST/v1/scoreapi key

Score a URL on our AI-readiness algorithm. Same engine that powers the public Mieteru checker, without rate limits and with a stable JSON contract.

POST/v1/searchapi key · pro+

Semantic search across our corpus. Embed your query with the same multilingual bge-m3 model we use, then return top-k matching pages.

Pricing

FREE

$0 /mo

1,000 calls / month
Health, stats, domain lookup
Score endpoint (5 calls/day)

STARTER

$50 /mo

10,000 calls / month
All public endpoints
Email support

PRO

$100 /mo

50,000 calls / month
Includes /v1/search
Industry slices (when available)

ENTERPRISE

$2,000+ /mo

1M+ calls / month
Bulk export
SLA + priority support

Example response

{
  "ok": true,
  "meta": {
    "domain": "example.jp",
    "tranco_rank": 84219,
    "country_code": "JP",
    "discovered_at": "2026-04-12T03:14:00Z",
    "last_crawled_at": "2026-05-15T03:35:44Z",
    "crawl_status": "done"
  },
  "signals": {
    "pages_total": 18,
    "pages_with_meta_desc": 17,
    "pages_with_h1": 16,
    "pages_js_rendered": 0
  },
  "pages": [
    {
      "url": "https://example.jp/",
      "http_status": 200,
      "fetched_at": "2026-05-15T03:35:44Z",
      "title": "株式会社例 — 公式サイト",
      "lang": "ja"
    }
  ]
}

Errors

Status	Body	Meaning
401	`missing_api_key`	No Bearer token / api_key.
401	`invalid_api_key`	Key is unknown or revoked.
404	`not_found`	Domain not in corpus yet.
429	`quota_exceeded`	Monthly quota hit — upgrade tier.
503	`embedding_service_unavailable`	Search needs a GPU; none rented right now.

Status

Live status: api.seoai.space/v1/health · api.seoai.space/v1/stats